GERQUISE RILEY
5-24-11
Force in Motion
Velocity

The speed and direction of an object’s motion
Force

A push or pull that acts on an object
Work

Energy used when a force moves an object
Power

The rate at which work is done, or energy
expended, per unit time.
Equilibrium

The state of a body or physical system that
is at rest or in constant and unchanging
motion.
Inertia

The resistance of a body to changes in its
momentum.
Acceleration

The rate of change of the velocity of a
moving body.
Machine

A device that applies force, changes the
direction of a force, or changes the strength
of a force, in order to perform a task,
generally involving work done on a load.